Sperm is the male reproductive cell that fertilises the egg during conception.3 Each sperm consists of a head (containing DNA), the mid-piece (containing mitochondria giving the sperm power) and a tail (for mobility).3
Sperm cell production takes place continuously in the testicles for around 70 days, comprising several stages.3
When sperm fertilises the egg, the sperm DNA fuses with the egg DNA to form an embryo, which should hopefully implant and develop into a baby.
Sperm can be vulnerable to damage by a process called oxidative stress, which occurs when there is an excess production of reactive oxygen species (ROS), also known as free radicals. ROS, often caused by a number of lifestyle factors, can affect the sperm’s mobility and its ability to bind to the egg.
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